The two tone mouse reminds me of when this used to happen in HB shows by mistake.

Is it a good thing to be distracted by a non-intended color shift?

I have a bit of nostalgic warmth for this paint error when it happened, as probably does John, or he would not have done so himself. But is that the same John that dislikes the letter U for closed eyes making it into Ren and Stimpy just because it was quick shorthand in a layout? A mistake becoming a stylism?